html,body {
    margin:0;
    height: 100%;
}
#app {
    height: 100%;
    font-family: Avenir, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-align: center;
    color: #2c3e50;
}

.x-plugin {
    width: 0;
    height: 0;
}

.x-button {
    position: relative;
    width: 100px;
    height: 30px;
    background: rgb(71, 152, 184);
    border-radius: 5px;
    border: 1px solid rgb(41, 110, 138);
    color: #fff;
    cursor: pointer;
}

x-button:active {
    box-shadow: 0 0 1000px inset rgba(0,0,0,0.3);
}